Feeding apparatus for chemicals



Oa. `'7, 1930. P. DQRSEY 1,777,298

FEDING 'APPARATUS Fon CHEMICALS Filed May 3. 1927 Il Il f' lllIIiIll-Illll i lgatented Get.. 7, 1930 UNITED STATES PATENr OFFICE FARMER DOESEIY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE IMPERIAL BRASS MANU: FACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS FEEDING APPARATUS ron CHEMICALS Application filed May 3,

My invention is concerned with Certain new und useful improvements in feeding apparatus for chemicals, which I have shown as substituted for a fundamentally diii'erent apparatus having the same function in my application No. 525,566, h'led December 29, 1921,

for an acetylene generator, in which the feed of the carbide is eifected at necessary intervals to maintain the desired pressure, by the gradual rise and sudden fall of a small gas bell through which alllthe gas being drawn from the generator must pass, the sudden fall being ell'ected by the sudden escape from the bell of the gas under pressure contained therein when the bell has been raised by the gas pressure high enough to lift its open bottom from the sealing liquid necessarily employed and in which it is ordinarily immersed.

ln my. improved construction, while still retaining an element rising and falling as before, l simplify its construction and improve its durability in operation by dispensing with the sealing liquid and employing other and dilferent means for permitting the sudden escape of the gas from beneath the piston, to which a bell may be attached, as will be hereinafterfully described and claimed.

To illustrate my invention, I annex hereto a sheet of drawings, in which the same reference characters are used to designate identical parts inboth the' figures, of which,-

Fig. 1 is a central. vertical section through the upper portion of an acetylene generator to which my invention has been applied; and

Fig. 2 is a central yvertical section through the receptacle containing the piston, but on a much larger scale.

10 is the generating Chamber of the customary type containing water, into which the carbide is dropped from the carbide holder 11 occupying the upper portion of the' cylindrical top 12 of the casing. Secured in oneside of the casing beneath the carbide chamber 11 is a pressure regulator 13 Containing a diaphragm opposed by a spring and acted on by the pressure of the gas in the generating chamber so that the position of the rod 14 projecting therefrom and secured at its' outer end to the diaphragm is controlled b the iressure of the gas in the tank 10. This rod 1927. Serial No. 188,569.

14 is pivoted at its outer end to the lever 15 fulcrumed at 16 in a suitable bearing piece 17 connecting the lower conical wall 18 of the carbide chamber with -the lower end of the Cylindrical Casing 12. The lever 15 has pivoted on its lower end a mushroom valve 19 which Co-operates with the circular outlet for the carbide forming the lower end of the cylindrical bottom portion 18, and this valve 19 stands at a distance from the outlet opening which varies with the pressure of the gas in the generating chamber 10, and it will be understood that the lower the pressure of the gas, the wider the space between the valve 19 and the opening, so that the carbide will escape in greater quantities each time the valve 19 is Vibrated so as to thereby increase the amount of gas generated and thus raise the pressure. When the pressure is high, the valve 19 stands closer to the outlet so that less carbide can escape each time the valve 19 is vibrated. The valve 19 has secured to its under side a rod 20 which extends through the short pipe 21 let into the side of the cylinder 12vand connected to the T 22, which has the short pipe 23 secured in its upper portion. The upper end of the pipe 23 is screwed into the boss 24 formed on the lower end of the chamber 25, the upper end of which is` closed by the head 26 secured thereto by the bolts and nuts 27. An outlet elbow 28 is'. screwed intothe top of the head, and is connected by the pipe 29, elbow 30 and pipe 31 and Connection 32 with the top of the gas washing chamber 33, in which the gas passes through water in the customary manner, and

is led therefrom by the outlet pipe 34 to the cutting or welding tool, or whatever apparatus 1s employed in connection with the generator.`

The apparatus thus far described is identical with that shown in my application No.

124,878, filed July 26, 1926, to which referight an readily moved b -concentrica ly 36 in place. The upper end of the rod 36 preferably has secured thereon between the nuts 38 and 39 a conical valve 40, a bell 41 and a iston 42, the bell and piston being refera l formed of aluminum so as to be the pressure of the gas which rises throug the pipe 23 and preferably asses through a pipe 43 secured with the pipe 23 in the bottom of the'chamber 25 and extendin up for about two-thirds of the depth of the c iamber, where the upper end preferably forms a seat for the valve 40. Assuming that the arts are in the position shown in Fig. 2 o the drawings, in which the vvalve has just been closed b the sudden descent of the piston 42' and the ell 41, the pressure of the gas rising through the .pipe 23 and tube 43 will lift the valve 40 from lts seat and will fill the bell 41 and esca e from underneath the bottom and engage t e underside of the piston 42, which fits somewhat'snugly inthe lower portion of the cylindrical chamber 25, so that the pressure of the gas tends to raise the piston 42 and thereby the bell 41 somewhat slowly, as there is a little leakage of the gas around the edge of the piston 42. The bell 41 and the attached piston thus move upward somewhat slowly, lifting the rod 36 andl tilting the rod 20. Near the upper end of the caslng 25, its in ternal diameter is suddenly increased by the oset 44 formed therein, and the instant that the piston 42 passes the offset, the gas accumulated under pressure beneath it is free-to escape suddenl and as it does, it allows the piston, bell, va ve 40 and rod 36 to fall sudenly, and this movement -transmitted to the rod 20 serves to swing the valve 19 suiiicient- .ly so thatthe particles of carbide cau ht between the valve 19 and the edges oft eoutlet are free to drop off and .down into the water in the chamber 10. This operation will, of course, be repeated automatically at a ratethat will depend upon the amount of that is bein drawn o if from the washing c amber 33, an the entire 4apparatus constitutes a.v very effective means for controllin the pres, sure of the generated carbide and eeping it substantially uniform.

While I have shown as a preferred form of my invention a structure em loying the refinements shown including t e tube 43, .the

valve 40 and the. ll 41, it will be understood that they are not essential to the fundamental mode of operation, which resides in the slow upward movementA of the iston 42 due to the gradual escaping of t e gas about its edges, until'it reaches `the offset 44, where it can escape ,so ra idly that the pressure beneath the piston 1s suddenl released to suchy an extentthat it can fall ck toits lowermost position, after which the cycle of operations is repeated.

While I have shown and described my invention as embodied in the form which I at present consider bt adapted to carry out its purposes, itiwill be understood that it is capable of modifications, and that I do not desire to be limited in the interpretation of the following claims except as may be 'necessian inletopening in its bottom and an outlet opening in its top and a vertical wall, of al bell therein through the open bottom of which the entering gas rises, and an imperforate piston at the top of the bell of the shape of the horizontal -cross section of 1the recep-H tacle and extending substantially'to the Wall thereof with which it cooperates to revent the rapid passage of the gas from t e inlet opening to the outlet opening, the .receptacle having an enlargement in its internal dimen, v

sions toward the upper end thereof so that when the piston reaches theV enlargement the gas under pressure beneath it can esca suddenly and rmit the bell to fall quic y.

2. In a evice of the class described, the combination with a closed receptacle circular in its horizontal internal cross section having an inlet opening in its bottom and an outlet opening in its top and a vertical wall, of a bell therein through the open bottom of which the entering gas rises, and an imperforate circular piston at the top of the bell extending substantially to the wall of the receptacle with which it co-operates to revent the rapid passage of gas from the in et opening to the outlet opening, the receptacle suddenly increasing 1n its internal diameterf near the upper portion thereofv so that when the piston reaches the increased diameter the gas beneath can escape suddenly and permit the fbell to fall quickly.

3. In a device of theclass described, the combination with a closed receptacle having an inlet opening in its bottom and an outlet opening in its top and a vertical wall, of a tube extending upwardly from the inlet opening toward the top ofthe receptacle, a bell therein which the gas enters through the tube, and an imperforate piston at the-top ofthe bell of 'the shape of the horizontal cross section of the receptacle and extending substan tially to the wall thereof with which it eooperat to prevent the rapid passage of gas from the inletopening to the outlet opening, the receptacle having an enlargement in its dilmnsions toward the upper end enlargement the gas beneat thereof `so .that vvhen the `piston reaches the denly and permit the bell to fall quickly.

4.' In a device of the 'class described, the combination with a-closed receptacle having an inlet opening 1n its bottom and an outlet opening in its top and a vertical wall, of a tube secured in the inlet openinghand extending upwardly therefrom, a bell ereinvvhich the rising gas enters through the tube, an imperforate piston at the top of the bell of the shape of the horizontal cross section of the receptacle and extending substantially to the Wall thereof with which it cooperates to prevent the rapid passage of gas from the inlet opening to the outlet sions so that when the piston reaches the enlargement the gas beneath can escape suddenly and permit the bell to yfall quickly.

5. In a device of the class described, the combinationvvith a closed receptacle having an inlet opening in its bottom and an outlet opening in its top and a vertical wadl, of an imperforate piston therein of` the shape of the horizontal cross section of the receptacle and extending substantially to the wall thereof with which it co-operates to prevent the rapid passage of the gas rom the inlet opening to the outletfopening, said receptacle having an enlargement in its internal dimensions so that when the largement the gas beneath can escape suddenly and permit it to fall quickly.

' 6. In a device of the class described, the combination with a closed receptacle having an inlet opening in its bottom and an outlet opening in its top and a vertical wall, of an imperforate piston therein of the shape of the n horizontal cross section of the receptacle and extending substantially to the wall thereof with which it co-operates to permit the gradual ascent of the plston under the pressure of the ascending gas, said rceptaclel and piston being designed so that the gas passes suddenly upward ast the piston `when it has reached a. certain eight so that the piston can fall rapidly.

In witness whereof, I have hereunto set my hand this 14th day of April, 1927.

' DORSEY.

. it can escape sudopening, said receptacle having an enlargement in its internal dimen` piston reaches the en- 

